Polish rod hanger



vAug. 11, 1931. LA RUE B. CHEVALIER 1,818,303 POLISH ROD HANGER FiledJune 1o, 1929 2 sheets-sheet 2 mi Qv lNvENoR BYez/Q//e ATTORNEY PatentedAug. 11, 1931 .LA-RUE B. CHEVALIER, OF 4IOLA, KANSAS ronrsnnon HANGER.Application ilcd .Tune 10,

My invention relates to pumping apparatus and more particularly tohangers for connecting one end of a walking beam in a 'drilling vrigwith a rod operating in an -oil V` well, for example a polish rodsupporting sucker rods in the well and operatin Ain a stuffing boX, theprincipal objects o' the invention being to maintain the rod in asnearly a straight line as possible for ef- '10 fecting a straight pullthereon, and to reduce the amount of friction between the rod and thebox and thereby save wear and damage to the same and minimize powerrequired foroperating the apparatus.

In ordinary practice, a walking beam having a hanger at one end forpivotally supporting the rod is supported at its center on a-pivotedbearing, and up and down motion imparted by a crank shaft connected to"20 the other end of the beam for reciprocating the rod Vcauses thehanger to describe an arc on each strike, thus moving the pivoted end ofthe rod laterally. The greatest distance between the cord of the arc andthe arc rep- 5 resents the amount of lateral motion imparted to theportion of the polish rod that projects from the stuiing boX.

The lateral motion is objectionable as the *polish rod is confined toperpendicular 30 motion within the stuffing box and below the same, sothat the out of line movement resulting from the lateral movement of theend of the beam causes the rod to bear against the stuffing boX, thustending to 935 wear 'the box and the rod, and increasing the amount ofpower required for `operating the apparatus.`

Further objects of'my invention therefore are to reduce the lateraldisplacement of a polish rod when reciprocated by a walking beam, and toimpartas nearly perpendicular motion .to the polishrod asppossible.In-accomplishing these and other objects .45 Vof the invention, vI .haveprovided improved details ofstructure, the Vpreferred forms of which areillustrated in the accompanying drawings, wherein:

Fig. `lois a perspective viewcf a portion `50 of pumping :apparatusshowing `my im- 1929. Serial No. 369,633.

proved hanger mounted A`on the walking beam and connected with thepolish rod.

Fig. 2 is an enlarged longitudinal vertical section of therod-supporting end ofthe walking beam and of my device, in `hori- .5&5zontal position, the positions of the beam end at extremes vof upwardand downward movement being shown in dotted lines. f

Fig. 3 is a front end elevation ofthe walking beam and hanger and upperends of @6,0 hanger rods. Y

Fig. t is a vertical transverse section of one arm of my improved hangervillustrating the upper and lower hinge pin openings.

Fig. 5 is a perspective view of the lower 6b hinge pin member to whichthe hangerrods are attached.

Y Referring in detail to the drawings:

l designates the supporting structure of oil well equipment, 2 wellcasing, 3 tubing, T10 and 4 a stuffingl box `in which apolish'rod 5 isslidably mounted. A Samson post 6 comprising a part of the structuresupports a trunnion -7 mounted transversely at the midpoint of a walkingbeam 8 adapted 'to f rock or swing on the post and operated by .a crank9 connected to the beam by a pitman ,10 and to a shaft 11 of a bandwheel 12 supported by the structure and operated by a prime mover notshown, through a belt 13.

The polish rodis ordinarily pivotallyconnected to the outer yend 14: ofthe beam for reciprocation'in the tubing to operate pumping apparatustherein.

A carrier 15 is fixed to the polish rod, ..85 and hanger rods 16 areadapted to connect n the carrier with the beam` for enabling the Vbeamto support and lift the rod.

My invention includes a hanger generally designated 17 including ahanger head 18 90 mounted on the end of the beam and hanger arms 19pivotally fmounted on the hanger head andconnected with the hanger rods,as presently described. i

The head `18 includes laterally spaced. 195 plates-20 secured toopposite'sides ofthe end portion of the beam and having dependingwing-like portions 21 projecting downwardly from the', beam and atright-angles to the axis thereof. :ma

4porting said bar.

the chord of the arc.

the arms 19 which have openings 26 for mounting the same on the pins.

The arms project an appreciable distance below the lower edges of theleg-like down- 'wardly projecting portions of the head plates, and havebearing openings 27 at their 'lower ends to receive pintles 28 atopposite ends of a cross bar 29 for pivotally sup- Openings 30 arebrovided in the bar to admit the upper ends of the hanger rods 16 whichare screw-threaded to receive nuts 31 whereby the rods are supportedfrom the bar and anchor nuts 32 overlying the opposite face of the bar.The outer ends of the pintles are reduced and threaded to receivewashers 33 and nuts 34. The arms are held in spaced relation for-parallelsuspension from the pins 25 by a reinforcing and stiffening`plate 35 bolted to lateral brackets or lugs 36 on the inner faces of thearm.

In ordinary practice, the pivotal mounting point of the polish rod moveshorizontally about 25% inches during the rocking` movement of a beamhaving a lever arm of about 12 feet in length from the post trunnion tothe rod pivot, and the rod is bent correspondingly. The distance namedrepresents the maximum spacing of the center of the arc over which thepoint moves from I reduce said spacing, by the structure described, andby further elements now to be described.

I locate the upper hinge pins in such relation with the trunnion 27 andthe well that when the beam is horizontal the hanger arms will dependsubstantially perpendicularly and parallel with the axis of the well,and 1n a plane spaced or offset as presently described from the axis ofthe well on the side of the Samson post.

A stop member 37 is then further provided at the lower edge of the headwings 1n such a position that when the end of the beam moves upwardlyfrom horizontal position into the upper half of its arc the stop willengage the arms and restrain the same from pivoting, so thatV the armswill be tipped and the rod supporting cross bar mounted in the lowerends of the arms will pivot. The arms contact the stop when the Ybeamoperates above center, and swing free to the outside when the beamoperates below center.

The stop comprises preferably a bar 38 mounted in the lower end of thewings and having ends protruding laterally therefrom to engage theswinging arms.

Reinforcing plates 39 are preferably riveted to the depending wings ofthe head plates and flanged bases 40 are provided for attaching thetrunnions 25 to the housing, the plates 39 and bases 40 on each headplate being in edge abutment, and the pins of the bar 38'extending'through the lower edge portions of the reinforcing plates.Channels 41 may be mounted on the beam for spacing the head plates andsupporting the head, end flanges 43 of brackets 44 fixed to the channelsbeing riveted to the plates.

The suspending device therefore provides two hinges, the upper hingecoming into action when the beam is moving below a horizontal planeincluding said hinge, and being prevented from functioning when -thebeam is moving above said plane, whereupon the lower hinge becomeseffective.

The path of the rod pivot is therefore divided, because of the provisionof the two pivot points, the arcs in which the two pivots move beingequal, and substantially less than the arc of the pivot in ordinarystructure of this character.

' The location of the upper pivot or hinge l in an example of the use ofthe invention wherein the radius of the arc or distance of the upperhinge from the beam trunnion is 12 feet, would be at such a point thatwhen the arms 19 hang vertically they are in a plane offset inch fromthe center of the well on the side of the same toward the Samson post.

In the example mentioned, the distances are proportionate to a stroke of27 inches.'

The walking beam is adapted to be in horizontal position when the crankis horizontal, and the length of the pitman is adjusted to meet thiscondition in order to provide minimum lateral movement of the polishrod.

What I claim and desire to secure by Letters Patent is:

1. In combination with a walking beam, a rigid head suspended from saidbeam, a jointed hanger unit including an upper section pivotally mountedon said head and a lower section adapted for coupling to a polish rod,and a stop on the head spaced from the beam and engageable by said uppersection to limit inward movement of said section during upward travel ofthe beam.

2. In combination with a walking beam, a rigid head plate on said beam,a hanger arm pivotally suspended from said plate, a

.hanger bar pivotally'suspended from said arm, means on the arm forcoupling to a polish rod, and a stop on said plate engageable by saidarm beneath the'A arm mounting for limiting inward movement of the armon upward travel of the beam.

IDO

3. In combination with a walking beam, head plates xed to and suspendedfrom the beam, arms pivotally mounted on and suspended below the plates,a cross bar pivotally mounted on said arms, rods suspended from thecross bar, means on the lower ends of the rods for supporting a polishrod, and stops fixed to the head plates engageable by the arms to limitinward pivotal movement of the arms on upward travel of the beam.

4. In combination with a walking beam, head plates fixed to andsuspended from the outer end of the beam, studs on said plates, armspivotally suspended from said studs, a cross bar having end bearingmembers pivotally mounted in the lower endsrof said arms, rods suspendedfrom said cross bar, means on the lower ends of the rods for conneotionwith a polish rod, and stop members projecting from said plates andengageable by the rear edges of said arms to limit rearward swingingmovement of the arms upon upward movement of the beam.

5. In a device of the character described including a pivotal walkingbeam, a head plate iiXed to the beam, and a hinged hanger unit includingan upper section pivoted to said plate and a lower section adapted tosupport a polish rod, a stop member on said plate engageable by saidupper section to limit horizontal movement of said section on pivotalmovement of the beam.

6. In a device of the character described including a pivotal walkingbeam, hanger arms, and a rod-supporting bar pivotally mounted in thelower ends of said arms, a head including plates iiXed to said beamhaving means for pivotally supporting said arms, and including wingsdepending below said beam and provided with stop members engageable bysaid arms to limit rearward swinging movement of the arms upon upwardmovement of the beam.

In testimony whereof I afiix my signature.

LA RUE B. CHEVALIER.

